Maintenance Instructions - Sears 917.253540 Owner's Manual

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MAINTENANCE
INSTRUCTIONS
BLADE CARE
For best results mower blades must be kept sharp. The blades
can be sharpened with a few strokes of a file or on a grinding
wheel. Do not attempt to sharpen while on mower.
PLACE THE MOWER CLUTCH CONTROL
LEVER IN THE "OUT" POSITION, LOCK
THE PARKING BRAKE , SHIFT INTO
NEUTRAL AND SHUT-OFF THE EN·
GINE. MAKE ABSOLUTELY SURE THE
BLADES AND ALL MOVING PARTS
HAVE COMPLETELY STOPPED. REMOVE
THE IGNITION KEY, DISCONNECT THE
SPARK PLUG WIRE(S) FROM THE SPARK
PLUG(S) AND KEEP WIRE{S) AWAY
FROM THE PLUG (S) TO PREVENT IN-
JURY FROM ACCIDENTAL STARTING .
When grinding, care should be taken to maintain blade balance
and the blade should be checked for proper balance before re·
installation on mower. Unbalanced or bent blade will cause ex·
cessive vibration when running, and eventual damage to mower
or engine. Replace bent or damaged blades.
To insure satisfactory operation, it is recommended that be·
fore the start of each mowing season, the. old blades be dis·
carded and replaced with new blades. Mower blades can be
purchased at all Sears retail stores and mail order outlets.
BLADE REPLACEMENT
It is not necessary to remove mower from tractor for blade re·
placement. Raising mower lift lever to highest position will per·
mit access to blades.
1.
Remove the two Hex Head Bolts and Lockwashers (Fig. 16) ..
2. 1nstall new blade with SHARP EDGE DOWN and secure
with two Lockwashers and two Hex Head Bolts. TIGHT·
EN SECURELY.
ALWAYS USE GRADE 5 HEAT TREATED
BOLTS TO ATTACH BLADES. CHECK
BOLTS IN BLADES OCCASIONALLY TO
MA KE SURE BOLTS ARE TIGHT. TOR·
QUE BOLTS 45 • 50 FT. LBS.
A GRADE 5 HEAT TREATED BOLT
CAN BE IDENTIFIED BY THREE
LINES INDICATED ON THE BOLT
HEAD AS SHOWN AT LEFT.
CLEANING MOWER
PLACE THE MOWER CLUTCH CONTROL
LEVER IN THE "OUT" POSITION, LOCK
THE PARKING BRAKE, SHIFT INTO
NEUTRAL AND SHUT-OFF THE EN·
GINE. MAKE ABSOLUTELY SURE THE
BLADES AND ALL MOVING PARTS
HAVE COMPLETELY STOPPED. REMOVE
THE IGNI TION KEY, DISCONNECT THE
SPARK PLUG WIRE(S) FROM THE SPARK
PLUG(S) AND KEEP WI RE(S) AWAY
FROM THE PLUG(S) TO PREVENT IN-
JURY FROM ACCIDENTAL STARTING.
Mower should be removed from tractor for cleaning. Water
pressure from a garden hose will remove fresh clippings from
underside of mower. Clean mower after each mowing. -7-
BLADE
FIGURE 16
FIGURE 17
DAILY MAINTENANCE
Make sure all nuts on bolts are tight, cotter pins and retainer
springs are secure. Keep blades sharp. Observe all safety pre·
cautions. Keep mower well lubricated.
BELT ADJUSTMENT
Remove Retainer Spring from Adjusting Pin and remove
Adju sting Pin from Idler Shaft Assembly (Fig. 17).
(Refer to Fig. 18). Remove Retainer Spring from Adjusting Pin
on Snubber Pull Rod in Idler Shaft Assembly. Remove Adjust·
ing Pin from hole.
(Refer to Fig. 17). Turn Adjusting Pin on Belt Tightener Link
counterclockwise to tighten belt, clockwise to loosen belt.
Engage clutch lever (push forward). Belt is properly adjusted
when belt can be squeezed together with thumb and fore fin-
ger (without undue pressure) midway between engine and
idler pulleys. After 2 hours use recheck belt for proper ten-
sion. Replace retainer spring in Adjusting Pin (Fig. 17).
Belt from center to outside mandrels is spring loaded and no
adjustment is necessary.
AT THIS TIME YOU MUST ADJUST THE
SNUBBER PULL ROD. FOLLOW THE IN··
FORMATION UNDER "ADJUSTMENT OF
SNUBBER" ON PAGE 8.